ENTRY 33167 20220308 32073316700000001 SUBENT 33167001 20220308 32073316700100001 BIB 11 32 3316700100002 TITLE Search for coherent bremsstrahlung from spontaneous 3316700100003 fission at 555 meter deep underground laboratory 3316700100004 AUTHOR (D.Pandit, D.Mondal, T.K.Ghosh, S.Mukhopadhyay, S.Pal, 3316700100005 A.Sen, A.K.Saha, V.N.Jha, S.Saha, C.Bhattacharya, 3316700100006 A.K.Mohanty) 3316700100007 INSTITUTE (3INDVEC,3INDTRM) 3316700100008 (3INDIND) Homi Bhabha National Institute, 3316700100009 Anushaktinagar, Mumbai 3316700100010 (3INDIND) Health Physics Unit, BARC, Jaduguda, 3316700100011 Jharkhand 3316700100012 REFERENCE (J,PL/B,823,136760,2021) 3316700100013 SAMPLE 252Cf of 12 u-Ci 3316700100014 DETECTOR (BAF2) LAMBDA array was arranged in 5 X 5 matrix using 3316700100015 25 detectors, each having 3.5 X 3.5 cm2 cross-sectional3316700100016 area and 35 cm long. 3316700100017 METHOD (COINC) gamma-gamma coincidence (70 ns) between the 3316700100018 start trigger and any one of the 25 detectors in the 3316700100019 LAMBDA array. High threshold (4 MeV) was chosen to 3316700100020 ensure fission events. 3316700100021 (TOF) The neutron-gamma discrimination of the events in3316700100022 the high energy spectrometer. 3316700100023 (PSD) To reject neutron detection by measuring the 3316700100024 charge deposition over two integrating time intervals 3316700100025 (50 ns and 2 us) in each of the detectors. 3316700100026 COMMENT By authors: 3316700100027 Upper limit at 95% confidence level of 3316700100028 5.E-11 photons/fis./MeV for gamma emission from nucleus3316700100029 -nucleus coherent bremsstrahlung in 25-180 MeV region. 3316700100030 ERR-ANALYS (DATA-ERR) No information on the source of uncertainty 3316700100031 STATUS (TABLE) Fig.4 of Phys.Lett.B,823(2021)136760 3316700100032 HISTORY (20220204R) Data received from Pandit on 4 Feb. 2022 3316700100033 (20220308C) VT 3316700100034 ENDBIB 32 0 3316700100035 NOCOMMON 0 0 3316700100036 ENDSUBENT 35 0 3316700199999 SUBENT 33167002 20220308 32073316700200001 BIB 1 1 3316700200002 REACTION (98-CF-252(0,F)0-G-0,PR,FY/DE) 3316700200003 ENDBIB 1 0 3316700200004 NOCOMMON 0 0 3316700200005 DATA 3 50 3316700200006 E DATA DATA-ERR 3316700200007 MEV PD/FIS/MEV PD/FIS/MEV 3316700200008 1. 3.88E-03 2.44E-06 3316700200009 2. 0.0169 5.10E-06 3316700200010 3. 0.0579 9.44E-06 3316700200011 4. 0.0508 8.84E-06 3316700200012 5. 0.0227 5.91E-06 3316700200013 6. 7.92E-03 3.49E-06 3316700200014 7. 1.71E-03 1.62E-06 3316700200015 8. 4.57E-04 8.39E-07 3316700200016 9. 1.58E-04 4.94E-07 3316700200017 10. 6.16E-05 3.08E-07 3316700200018 11. 3.02E-05 2.16E-07 3316700200019 12. 2.06E-05 1.78E-07 3316700200020 13. 9.18E-06 1.19E-07 3316700200021 14. 3.96E-06 7.80E-08 3316700200022 15. 2.39E-06 6.07E-08 3316700200023 16. 1.28E-06 4.44E-08 3316700200024 17. 5.43E-07 2.89E-08 3316700200025 18. 1.40E-07 1.47E-08 3316700200026 19. 5.38E-08 9.10E-09 3316700200027 20. 1.38E-08 4.62E-09 3316700200028 21. 6.15E-09 3.08E-09 3316700200029 22. 4.62E-09 2.66E-09 3316700200030 23. 1.54E-09 1.54E-09 3316700200031 24. 0. 0. 3316700200032 25. 0. 0. 3316700200033 26. 0. 0. 3316700200034 27. 0. 0. 3316700200035 28. 0. 0. 3316700200036 29. 0. 0. 3316700200037 30. 0. 0. 3316700200038 31. 0. 0. 3316700200039 32. 0. 0. 3316700200040 33. 0. 0. 3316700200041 34. 0. 0. 3316700200042 35. 0. 0. 3316700200043 36. 1.54E-09 1.54E-09 3316700200044 37. 0. 0. 3316700200045 38. 0. 0. 3316700200046 39. 0. 0. 3316700200047 40. 0. 0. 3316700200048 41. 0. 0. 3316700200049 42. 0. 0. 3316700200050 43. 0. 0. 3316700200051 44. 0. 0. 3316700200052 45. 0. 0. 3316700200053 46. 0. 0. 3316700200054 47. 0. 0. 3316700200055 48. 1.54E-09 1.54E-09 3316700200056 49. 0. 0. 3316700200057 50. 0. 0. 3316700200058 ENDDATA 52 0 3316700200059 ENDSUBENT 58 0 3316700299999 ENDENTRY 2 0 3316799999999